What happens when a solid releases energy?

Answer 1

Solid is the form in which the atoms or molecules or ions would be arranged in a perfect order. But these would do simple harmonic vibration and electrons would roam here and there. Hence we call the bonding as metallic bonding. As this solid releases energy then the amplitude of vibration would become less and less, the roaming speed of electrons would also decrease. When the solid attains the absolute zero ie 0 K or -273.16 deg celcius, then amplitude of vibrations become zero and electrons become static. This is the state where the whole energy has been given out by the solid. If there be a possibility of converting mass into direct energy then according to the familiar mass-energy equivalence, E = m c2 the mass of the solid would give out energy. But such a phenomenon is not observed so far. But only the nuclear decay gives out radiations in the form of alpha particles, beta particles and gamma radiation. So science would go deep and find soon such hidden secrets.

Answer 2

When a solid releases energy, it can either undergo a phase change (such as melting or sublimation) or release the energy as heat, light, or sound. The energy release is usually a result of the rearrangement of atoms or molecules within the solid.